Ursnif Redirection Of Discovery Commands

Detects the redirection of Ursnif discovery commands as part of the initial execution of the malware.

Sigma rule (View on GitHub)

 1title: Ursnif Redirection Of Discovery Commands
 2id: 7aaa5739-12fc-41aa-b98b-23ec27d42bdf
 3status: test
 4description: |
 5        Detects the redirection of Ursnif discovery commands as part of the initial execution of the malware.
 6references:
 7    - Internal Research
 8author: '@kostastsale'
 9date: 2023-07-16
10tags:
11    - attack.execution
12    - attack.t1059
13    - detection.emerging-threats
14logsource:
15    category: process_creation
16    product: windows
17detection:
18    selection:
19        ParentImage|endswith: '\explorer.exe'
20        Image|endswith: '\cmd.exe'
21        CommandLine|contains|all:
22            - '/C '
23            - ' >> *\AppData\local\temp\*.bin'
24    condition: selection
25falsepositives:
26    - Unlikely
27level: high

References

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